Closure for boiler-casingsm, &amp;c.



D. MOSHBR. GLOSURE POR BOILER- GASINGS, dac.

APPLICATION FILED DBG. 16, 1911.

Patented Nov. 5, 1912.

invento-z 'permit the passage'o other instrument freely fpiai CHARLES D.MOSHER, 0F NEW YDRK, N. Y.

cLosUnE non noinnnfcnsmes, am.

fb all whom 'itmay concern.'

Be it known that I, CHARLES D. Mosman, a citizen of the United States,residing 1n the borough of Manhattan of the city of New York, county ofNew York, State of New York, have invented certain newand usefulImprovements in Closures for Boiler- Casings, &c., of which thefollowing 1s a specification, reference being hadto the accompanyingdrawings, which form a part hereof.

In the continued operation of Watertube boilers with inclined tubes itis necessary, from time to time, to remove the accumulations of soot onthe tubes. This is generally accomplished byi the use of a steam-lance,that is, a pipe having perforations at its end,which is connected -witha steam-'hose and introduced among the water-tubes through hand holes inthe casing of the boiler. The steam is generally used at high pressureand the result is that soot, dust and steam are blown back into the fireroom through the hand hole around the steam-lance, it being necessary tomake the hole considerably larger than the' steamlance in order that itmay be moved in different directions. The removal and replacement of thehand hole covers also requires considerable time venience. Somewhatsimilar conditions eX- ist With regardl to the introductionlofpyrometers, draft-gages', or other instruments.

It is the object of this invention to provide a door or and closedreadily and will permit` the free introduction of the steam-lance orother instrument and its necessary movement without permitting theescape of hotl gases,

steam, dustor soot, which in the case of a pyrom eter or 'draft-gage,might affect the4 accuracy of the reading. This object is attained bysecuring in each opening through the boiler casing a spherical bearingand mounting thereln a spherical closure which has throu h it anaperture to the steam-lance or but without undue looseness, while thesphere or spherical door can be turned, when the lance is removed, so ast close the aperture completely.

T e invention will be more fully exed hereinafter .with reference to theac trated and in wh1ch Figure 1 is a view partly in elevationSpecification of Letters Iatent. .Application led December 16, 1911.

V lance being `other structure and involves some inconi closure whichcan be opened and secured by mpanying drawing in which it is illus-Serial No. 666,220.

showing s o much of a water-tube boiler as is necessary to enable theapplication of the invention thereto to be understood. Fig. 2 is a Viewin section on the plane indicated by the line 2 2 of Fig. l, looking inthe direction of the arrows. Fig. 3 is a detail View on a larger scaleshowing a portion of the boiler casing with the improved door or closurein position, a portion of a steamview of the parts shown in Fig. 3, thesteam-lance being removed. Figs. 5 and '6 are detail views showingdifferent positions of the door orV closure.

PatentedN ov. 5, 1912.

also shown. Fig. 4 is a front f It will be obvious that the improveddoor or closure is capable of application-to a water-tube boiler of anykind, or toany of similar kind, such as a superheater, feed waterheater, etc.

In Figs. l and 2 there is illustrated a boiler comprising a water-druma, a steamdrum b, and a series of water-tubes extendlng from one drum tothe other, with an outer casing d. The latter is formed, at

-convenient intervals, with' hand holes e and e', which are disposed soas to permit a steam-lance, pyrometer, draft-gage or other instrument,to be introduced wherever required, as, in the case of a steam lance,from the end and from the side so that every part of the entire seriesof tubes can be reached with the steam jets from the nozzle of thelance. In each hand hole e and e is secured 'a spherical bearing f withopen front andrear faces, which is conveniently formed in two parts, asshown in Fig. 3, rivets f to the casing d of the boiler. In the bearingf is mounted a spherical door g which has a diametrical aperture g ofsuch l'size and shape as to permit the introduction therethrough of thesteam-lance la, or other instrument but without such looseness as topermit the escape of clouds of steam and dust or any material leakage.The sphericalv door is also provided with a projecting pin g2 by whichit can be turned either to expose the aperture g or to conceal the samewithin the bearing f.

lVhen it is desired to steam-lance, hose with a through one clean offthe tubes, a connected by a flexible steam and another of the sphericaldoors between the rows of water-tubes and is moved about, as permittedby the movement of the spherical door in its bearing, so

steam supply, is introduced as. to cause the nozzle to sweep over theadjacent tubes. The pin g2 is so placed W1th respect to the aperture gas not to interfere With the free movement of the lance in the planewhich includes the major axis of the aperture. When the operation hasbeen carried on long enough through one hand hole, the lance isWithdrawn and inserted through the door of another hand hole, the lirstbeing closed by moving the spherical door, by means of the pin g2, so asto cause the aperture g to be covered by the spherical bearing.

I claim as my invention l. A closure for boiler casings etc., comprisinga spherical bearing adapted to be secured in an opening' in the boilercasing, a spherical door mounted in said bearing and normally closingsaid opening and having an aperture for the introduction of aninstrument therethrough, and a pin 4secured in the spherical door andprojecting through the opening in the spherical bearing Whereby the doormay be moved to cause the opening and aperture to register. 2. A closurefor boiler casings, etc., comprising a bearing adapted to be securedper,- manently in an opening in the boiler casing, a spherical doormovably secured in said bearing and normally closing said opening andhaving an aperture therethrough, and means for moving said door to causethe aperture and opening to register.

This specification .signed and witnessed this 15th day of December A.D., 1911.

CHARLES D. MOSHER.

Signed in the presence of- VV. B. GREELEY, WoR'rHING'roN CAMPBELL.

